Vultr MCP

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the action is 'Start' (implying a state change) and mentions smart identifier resolution, but lacks critical details: required permissions, whether this is idempotent, expected execution time, error conditions, or rate limits. The return value is vaguely described as 'Success message' without specifying format or content.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is efficiently structured with a clear purpose statement followed by specific sections for Args and Returns. Each sentence adds value: the first states the action, the second explains identifier resolution, and the last describes the return. There is no redundant or wasted text.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a mutation tool with no annotations and no output schema, the description is incomplete. It lacks information on behavioral traits (e.g., idempotency, side effects), error handling, prerequisites (server state), and detailed return values. The parameter explanation is good, but overall context is insufficient for safe and effective use by an AI agent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, but the description compensates well by explaining the single parameter's semantics: 'server_identifier' accepts 'server label, hostname, or UUID'. This adds meaningful context beyond the schema's basic string type, clarifying acceptable identifier formats. However, it doesn't detail constraints like length or format patterns.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Start') and resource ('a bare metal server'), making the purpose immediately understandable. It distinguishes from sibling tools like 'reboot_bare_metal_server' and 'stop_bare_metal_server' by specifying the starting action, though it doesn't explicitly contrast with them.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives like 'start' (generic) or 'reboot_bare_metal_server'. It mentions smart identifier resolution but doesn't explain prerequisites, such as the server needing to be in a stopped state, or when not to use it.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.